There's been many similar discussions here. The only way to find out is trying it. It might or might not work, generally not ideal. Best to get the recommended mast (same brand) if you can as the sails have been designed and tested on that mast.
i dont think smaller size sails are as sensitive to bend curve as the larger. plus if it has an adjustable top you can move it up/down the mast to find a section with the closest curve. Try and if you cant get it right buy the correct mast
Should be fine for foiling, if that's what you intend to use that sail for.
